15 December 2021
Green hydrogen is poised to revolutionise renewable energy for some key industry sectors - but in Australia these large water demands are also poised to accelerate some of our existing challenges in providing water security for industry and regions in a way that is affordable and sustainable.
Green hydrogen requires green inputs, and with water as the key raw material, requiring around 9 litres of water per kilogram of hydrogen produced, it seems we should be sourcing this water thoughtfully. What could this look like?
It might be easy to assume existing nearby water supplies should be able to handle early pilot phases of production and that in the future ‘desalination plants or similar’ could cover the rest, but technical and financial feasibility is unlikely to be that simple, and the question remains - is this ‘green’ enough for the coming market?
Perhaps the answer lies in the concept of stewardship, where the blind consumption of a commodity gives way to an engaged approach to responsible management of it instead. In regions where hydrogen production will be adding to a long list of increasing water demands from population and industry, water availability can’t stay as a project-specific or sitespecific consideration. Water represents an interconnected system, a shared challenge, a collective opportunity.
We are already seeing our customers across industries increasingly asking for support to understand the broader risks associated with the water systems they operate within - with an eye on governance, stakeholder resilience, environmental impact, and community risks in addition to the real-world security of the water supply needed. It seems likely that this trend might accelerate as large industrial demands continue to come online with a foreseeable market expectation of being genuinely sustainable.
There are likely to be a whole range of potential options for water sourcing that could supplement new supplies - especially in the interaction with other local water systems. The cheapest of these options is nearly always the freeing up of more water by finding opportunities to optimise demands and eliminate embedded wastage in nearby supplies, but there are also opportunities for industrial and municipal scale wastewater reuse and sharing with much lower
energy and cost intensity than sourcing new water. No doubt new water sources will need to be an important part of the solution but working collaboratively with other stakeholders in the region to map out constraints and put all options on the table as a first step is likely to be strategic from a risk and financial perspective.
While the mix of opportunities and barriers is likely to be unique to each location, a common thread is likely to be the need to be planning well ahead. A lesson that the water industry has learned through experience is that last-minute reactive solutions to water shortages are rarely feasible and never economic.
With careful up-front consideration it is exciting to think that the green hydrogen industry could avoid the trap of treating water as the ‘missing piece’, and instead to show leadership in water management by acting as thoughtful stewards of their supply chain.
Principal Engineer, Water Efficiency Team, BMT
Principal Engineer, Water Efficiency Team, BMT
Adam’s 17 years of detailed water management, efficiency analysis and auditing has provided him with industry leading skills and experience related to technical water efficiency and resource management. He is driven to find the convergence of business investment opportunities and water risk mitigation in a way that provides tangible and useful advice. A dynamic approach to innovation with a strong sense of economic and
environmental feasibility continues to drive Adam to achieve ever more insightful and practical solutions with measurably worthwhile results.
Comfortable with the management of both small and large projects, he has completed hundreds of water efficiency audits throughout Australia, developed and managed industry-leading research into water use, managed strategic water use planning for large
organisations and provided training and education to resource efficiency specialists in the commercial and government sectors.
As co-chair of the AWA’s Water Efficiency Specialist network and with a breadth of expertise spanning a range of sectors, Adam is a key industry expert in water use and management across various combinations of industrial, commercial, and government sites and precincts.
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The potential opportunities and rewards are vast. Let’s change where we need to, let’s collaborate more. We will not just survive, but thrive!